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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.2.2/] [gcc/] [config/] [sparc/] [crtfastmath.c] - Rev 307
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/* * Copyright (C) 2001 Free Software Foundation, Inc. * Contributed by David S. Miller (davem@redhat.com) * * This file is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2, or (at your option) any * later version. * * In addition to the permissions in the GNU General Public License, the * Free Software Foundation gives you unlimited permission to link the * compiled version of this file with other programs, and to distribute * those programs without any restriction coming from the use of this * file. (The General Public License restrictions do apply in other * respects; for example, they cover modification of the file, and * distribution when not linked into another program.) * * This file is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; see the file COPYING. If not, write to * the Free Software Foundation, 51 Franklin Street, Fifth Floor, * Boston, MA 02110-1301, USA. * * As a special exception, if you link this library with files * compiled with GCC to produce an executable, this does not cause * the resulting executable to be covered by the GNU General Public License. * This exception does not however invalidate any other reasons why * the executable file might be covered by the GNU General Public License. */ #define FPRS_NS (1 << 22) /* Non-Standard fpu results */ static void __attribute__((constructor)) set_fast_math (void) { unsigned int fsr; /* This works for the 64-bit case because, even if 32-bit ld/st of the fsr register modified the upper 32-bit, the only thing up there are the 3 other condition codes which are "do not care" at the time that this runs. */ __asm__("st %%fsr, %0" : "=m" (fsr)); fsr |= FPRS_NS; __asm__("ld %0, %%fsr" : : "m" (fsr)); }
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